Granted Patent
Utility
US 4,513,348 · App. 06/570,552
Low parasitic capacitance pressure transducer and etch stop method
Inventor:
Daniel H. Grantham
Patented Case
View Patent ↗
Granted: Apr 23, 1985
Filed: Jan 13, 1984
Inventor
Daniel H. Grantham
Assignee (at issue)
UNITED TECHNOLOGIES CORPORATION
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.